Smartphone camera takes users’ pulse passively during device use

Nature, Published online: 01 June 2026; doi:10.1038/d41586-026-01488-7 A machine-learning system has been developed that can monitor heart rate using facial video clips that are captured passively by the user-facing camera during everyday smartphone use. The system meets industry accuracy standards for heart-rate measurement and is as accurate as wearable technology for measuring daily resting heart rate.